141236-32-0Relevant articles and documents
Alkaline metallic reagent-catalyzed hydrocarbocyclization reaction of various active methine compounds having an unactivated 4-alkynyl or allenyl group
Kitagawa, Osamu,Suzuki, Takashi,Fujiwara, Hiroki,Fujita, Masao,Taguchi, Takeo
, p. 4585 - 4588 (1999)
On using a catalytic mount of NaH or n-BuLi, hydrocarbocyclization reaction of various active methine compounds having an unactivated 4-pentynyl or 3,4-pentadienyl group proceeded through proton transfer mechanism to give methylenecyclopentane derivatives
An efficient and general microwave-assisted copper-catalyzed Conia-ene reaction of terminal and internal alkynes tethered to a wide variety of carbonucleophiles
Montel, Sonia,Bouyssi, Didier,Balme, Genevieve
experimental part, p. 2315 - 2320 (2010/11/05)
This paper describes a highly efficient, microwave-assisted, Conia-ene reaction of alkynes bearing a stabilizing carbon nucleophile. The reaction, catalyzed by a commercially available copper catalyst, proceeds under neutral conditions and is generally applicable even to less reactive nucleophiles such as malonate, cyanoacetate, and sulfonylacetate derivatives. This copper-mediated cycloisomerization is also applicable to internal unactivated alkynes leading exclusively to the corresponding 5-membererd products having an E-olefinic chemistry.
Intramolecular carbotitanation reaction of active methine compounds having an unactivated alkyne mediated by TiCl4-Et3N
Kitagawa, Osamu,Suzuki, Takashi,Inoue, Tadashi,Taguchi, Takeo
, p. 7357 - 7360 (2007/10/03)
In the presence of TiCl4 and Et3N, intramolecular carbotitanation reaction of active methine compounds having an unactivated 4-alkynyl group proceeds in a highly cis-selective manner to give methylenecyclopentane derivatives in good
Carbocyclization reaction of active methine compounds with unactivated alkenyl or alkynyl groups mediated by TiCl4-Et3N
Kitagawa, Osamu,Suzuki, Takashi,Inoue, Tadashi,Watanabe, Yoko,Taguchi, Takeo
, p. 9470 - 9475 (2007/10/03)
In the presence of TiCl4, Et3N, and I2, iodocarbocyclization reaction of various active methine compounds having alkenyl groups gave iodocycloalkane derivatives in good yields. On the other hand, TiCl4 and Etsu
SYNTHESIS OF ETHYNYLIDENE CYCLOPENTANES BY A CYCLISATION CATALYZED BY THE SIMULTANEOUS PRESENCE OF PALLADIUM (0) AND COPPER (I)
Boussy, Didier,Balme, Genevieve,Gore, Jacques
, p. 6541 - 6544 (2007/10/02)
Ethynylidene cyclopentanes 3 can be formed in 35-71percent yield from the reaction of the enolates of compounds such as δ-acetylenic malonates with 1-halogeno-1-alkynes.This reaction requires catalysis by both palladium (0) and copper (I) species.